VANCOUVER BARRACKS W FLAGSTAFF — NGS RD3400

This triangulation station is part of the National Geodetic Survey network, which provides the foundational horizontal control for surveying and mapping activities across the United States. Located near Vancouver, Washington at coordinates 45.62672°N, 122.66087°W, this trig point serves as a reference monument for establishing accurate positions in the region. Triangulation stations of this type were historically established to create networks of known positions from which surveyors could measure distances and angles for mapping and property boundary determination. The point's documented coordinates make it valuable for verifying survey work, calibrating modern positioning equipment, and maintaining the continuity of geodetic control in the Pacific Northwest. Verification and documentation of such monuments remain important for the surveying profession, ensuring the integrity of the geodetic framework upon which civil engineering, land management, and geographic information systems depend.

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